Reaxis®  C221

REAXIS® C221 is a versatile organotin catalyst that can be used in various silicone and polyurethane applications. Additional applications of REAXIS® C221 include:

  • Catalysis of urethanes where low color is required
  • Esterification and transesterification reactions
  • Silicone condensations (e.g. RTV resins)
  • Silane modified polyethylenes.

Custom formulations of REAXIS® C221 are available upon request.

Request A Sample Download The Technical Data Sheet

Technical Information

  • Chemical Name Dibutyltin Dineodecanoate

Typical Specifications

Parameter Range
Tin Content (%) 19.5 - 22.0
Color (Gardner Number) 5 Max
Density (g/ml) 1.0 - 1.1

Package & Storage


  • 44 lb (20 kg) plastic drums
  • 485 lb (220 kg) drums


REAXIS® 221 should be stored in the original packaging at moderate temperatures and kept from freezing. The container should be closed tightly after each use to maximize shelf life.

Safety and Handling

Before use of Reaxis products please refer to the relevant Safety Data Sheet (SDS) for safety and toxicological data as well as for the information on proper transportation, storage, and use. SDSs are available by request via our web site, contacting your local representative, or emailing direct to

This information is provided to the best of our knowledge but without obligation. Reaxis is not liable for any incorrect or missing information. This data sheet becomes invalid upon publication of a new version. Please contact us for the latest version.

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